I'm not a DIY'er, so I began using SkinMedica Vitamin C/E Complex about 10 weeks ago because so many people on this forum seemed to think Vit C is an essential part of a skin regimen. Now I understand why. Outside of Botox, I have never seen anything make such a noticeable difference in my skin so quickly. My skin is clearer, firmer and my pores are smaller. Defnitely hooked. I've just received my second bottle, ordered at a discount through Amazon.